42. If a room 15 m long requires 7500 tiles, each 15 cm x 12 cm to cover the entire floor, then the breadth of the room is :
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Author:
annj5az
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The breadth of the room is 9m.
Given:
Length of the room=15 m
Dimensions of the tile=15 cm and 12 cm
Number of tiles=7,500
To find:
The room's breadth
Solution:
The required breadth can be obtained by determining the area of the floor.
The floor's area=number of tiles ×area of each tile
The area of each tile=15 cm × 12 cm
=0.15m×0.12m
=0.018 [tex]m^{2}[/tex]
Using the area of the tile,
The floor's area=7500×0.018
=7500×18/1000
=75×18/10
=75×9/5
=15×9
=135 [tex]m^{2}[/tex]
Now, the area of the floor=length of the room×breadth of the room
Using values,
135=15×breadth
135/15=breadth
9m= breadth
Therefore, the breadth of the room is 9m.
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Author:
pashafrost
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